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\bibitem{Pandolfi_etal2010} Pandolfi, S., Cooray, A., Giusarma, E., Kolb, E. W., Melchiorri, A., Mena, O., et al. (2010). Harrison-Zel{\textquoteright}dovich primordial spectrum is consistent with observations. \textit{Phys. Rev. D}, \textit{81}(12), 123509--6pp.

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